Claude Code v2.1.290

Published October 5, 2026 · Category: AI Agents

Overview

What's changed

• Added serverToolUses to the result of a mod's turn.step hook: the tool calls the API ran itself (the advisor), each with its id, name, input, start and end
• Added agentId to the tool.check event of plugin hooks, so a hook can tell a subagent's permission check from the main session's
• Added ceiling to the question and verdict a mod's tool.check hook reads, naming the approval an organization requires for a tool
• Added ThemeKey and Color types to the plugin hooks typings, so an editor lists the theme colors a mod's drawing can name
• Added to claude plugin validate: each hook a mod registers at a gating site is listed with whether it has a .catch (gatingHooks under --json)
• Added a Deny button to the Claude apps gateway's sign-in approval page: it ends the pending sign-in, so the waiting terminal stops within seconds
• Added claude attach <name> and claude logs <name>: part of a session name works in place of the id
• Added /claude-api managed-agents-onboard <url> to set up the Managed Agents pattern a page describes as ant apply files
• Added /claude-api managed-agents-onboard <quickstart-name> to build a Console quickstart template, such as deep-researcher, with the ant CLI
• Added a warning when a managed settings file is a link to a file outside the managed settings folder
• Added a /status and doctor warning when managed settings ignore user-configured sandbox allowRead paths or allowed domains
• Fixed requests failing behind proxies and gateways that reject one of Claude Code's beta headers with a status other than 400, or together with a second beta
• Fixed long sessions with hundreds of images getting stuck on "Request rejected as unprocessable by the model" errors
• Fixed a turn ending at once when the API's output content filter stopped a reply while Claude was still thinking; the request is now retried once before the error is shown
• Fixed resumed subagents and teammates losing their earlier thinking and prompt cache after receiving a message mid-run
• Fixed WebFetch silently dropping page text past 100,000 characters; it now says how much was unread and takes an offset to read on
• Fixed a crash ("Maximum call stack size exceeded") when a response nested lists or quotes thousands of levels deep
• Fixed /rewind not listing a prompt sent while Claude was still working
• Fixed scheduled tasks (/loop with an interval, reminders) silently not coming back on resume once the conversation was compacted; covers compactions made from this version on
• Fixed scheduled tasks set in the foreground never firing after a ← or /background hand-off, and recurring ones firing an extra run on every resume, respawn or fork
• Fixed headless --json-schema runs exiting non-zero with is_error: true on a success result when the connection dropped after the structured output was already delivered
• Fixed plan mode letting the auto mode classifier approve non-read-only connector tools that carry a server-pushed ask policy
• Fixed a project CLAUDE.md, rule or AGENTS.md symlinked outside the working directories loading under permissions.blockReadsOutsideWorkingDirectories or a Read deny rule
• Fixed URL allow and deny patterns with a wildcard inside an xn-- host label matching differently from one process to the next
• Fixed an MCP server provided by your organization being relisted as your own after signing in or reconnecting, including from a late result in headless and SDK sessions
• Fixed /ultrareview dropping uncommitted changes without a warning on Windows when git stash create failed, and refusing them after a git add -N file was deleted or moved
• Fixed the plansDirectory setting's project-root check for paths that contain a backslash on macOS and Linux
• Fixed replies in very long Remote Control and cloud sessions that could appear a block at a time instead of streaming in
• Fixed the background daemon's log passing terminal control characters to the screen under claude daemon run and claude daemon logs; they now show as \uXXXX escapes
• Self-hosted runner: Fixed a crafted, very long line of a session's error output freezing the runner for several seconds
• Fixed a plugin hook with a .catch being unloaded, and its .catch skipped, when the hook kept the hooks worker busy on a prompt or tool call
• Fixed a mod's turn.step result listing a tool call that a mid-response model fallback had discarded
• Fixed a Cowork cloud session's reply sometimes never finishing when its container restarted just after Claude sent a message or a file
• Fixed claude plugin validate and plugin loading refusing a hooks module that destructures an option named like one of its top-level functions
• Fixed /ultrareview failing to upload uncommitted changes when core.safecrlf=true is set in git's configuration
• Fixed the effort level changing when a flagged message is retried on a fallback model that has a different level saved in settings
• Windows: Fixed multi-line ! shell blocks in skills and commands failing when the file is saved with CRLF line endings
• Fixed Claude Code hanging until killed when a /permissions tab was clicked while searching in fullscreen mode
• Fixed conversation compaction sometimes failing with a "null is not an object" error
• Fixed plugin hooks reading an empty answer on turn.complete for a subagent that hands its report back in auto mode
• Fixed a mod being unloaded without a message when a refresh followed its failed reload; its failure line now says the version loaded before is unloaded
• Fixed a mod's prompt.submit hook that drops a prompt after calling next(e) being ignored silently: the hook is now reported as failed, by name
• Fixed a mod's pane or band being redrawn without end when it followed its end over a tree that changed height at every drawing
• Fixed an image read on macOS and Windows being able to return a file outside what was approved, through a link swapped in mid-read
• Fixed a case where a user-installed mod could get an organization's plugin unloaded; the mod is now the one unloaded
• Fixed disableClaudeAiConnectors and allowedMcpServers URL rules not being applied to some MCP entries declared in .mcp.json, plugins or agents
• Fixed a mod's inline pane being redrawn without end when its tree changed height at every drawing
• Fixed an @-mention under the read block or --restricted being able to read a file outside the working directories through a link changed mid-read
• Fixed Esc in the agents view confirming "Press enter again to restart this session — it isn't responding"; Esc now just reopens the session
• Fixed agent view losing a background session's /loop run count, countdown and live status line after the session enters a worktree that it creates
• Fixed claude agents sessions in manual permission mode asking for approval to read an image pasted into a reply or a new agent's prompt
• Fixed a deny or ask rule missing a command or path whose name came from a variable set as a prefix on declare, typeset, export or readonly
• Fixed Read deny rules not applying to image paths pasted or dragged into the prompt, or to file names listed for an @-mentioned folder
• Fixed a case where a user-installed mod could make an organization's guard skip its check; such a mod is now unloaded
• Fixed plugin hooks stalling each redraw when a mod draws a long multi-line text holding non-Latin characters
• Fixed repeated Ctrl+X in the agents view deleting the whole next section after the bottom session of a section was deleted
• Fixed You should know writing its notes in English regardless of the language setting
• Fixed a freeze after sending some very long messages
• Fixed a slowdown when expanding the transcript (ctrl+o) or resizing over large tool output that contains non-ASCII characters such as arrows, dashes or box-drawing
• Fixed claude respawn re-sending an earlier message to a backgrounded session that has no saved transcript instead of starting it with an empty conversation
• Fixed Esc after an n: or Ctrl+F search in the agents view moving focus to a section header, where Ctrl+X twice would delete every session in the section
• Fixed claude agents saving a slash command it could not deliver to a stopped session and then running it by itself the next time that session restarted
• Fixed /ultrareview uploading uncommitted changes unfiltered for files under a git filter driver named unset or unspecified; the upload now stops and asks you to rename the driver
• Fixed auto mode denials suggesting a permission rule that would skip the classifier for a whole tool or that Claude Code would ignore
• Fixed claude --teleport and /teleport deleting the files in a folder that had replaced a tracked file of the same name when you chose to stash: the stash is now refused, and says why
• Fixed Esc confirming agent view's "Press enter again to restart this session fresh" prompt
• Fixed agent view's /loop run count freezing and its countdown disappearing after /clear; the count now restarts with the new conversation
• Fixed --channels permission relay: a reply ID that repeats within a session is now ignored instead of approving a different prompt
• Fixed /chrome "Reconnect extension" not restoring browser tools after a failed Chrome connection, and added an explanation when it can't (#98135)
• Fixed mods staying off for people who reach Claude through a gateway (ANTHROPIC_BASE_URL with ANTHROPIC_AUTH_TOKEN) and have no Anthropic account
• Fixed replies sent from claude agents just after a background session crashed being refused after 2 seconds: they are now retried for up to 12 seconds while the session restarts
• Fixed slash commands and answers to a multiple-choice question that claude agents could not deliver to a running session being saved and sent by themselves the next time it was restarted
• Fixed sandboxed commands that pipe a heredoc into another command (cat <<EOF | python3) asking for approval on every run
• Fixed claude agents failing with "Couldn't restart the background service" and background sessions stopping after a Homebrew upgrade (takes effect from the upgrade after this one)
• Fixed agent view's "restart this session fresh" re-sending an earlier message from the session instead of starting with an empty conversation
• Fixed Bash permission checks auto-approving some read-only commands (such as rg or git grep) whose arguments the shell would still expand as wildcards; these now prompt for approval
• Fixed claude plugin test refusing to run after an upgrade because of an out-of-date saved setting
• Fixed Bash permission checks auto-approving certain commands whose variable names zsh reads differently from bash; these now prompt for approval
• Fixed a short form of a git clone option keeping the sandbox exemption from a git pattern such as git * in sandbox.excludedCommands; it is now treated like the long form
• Fixed the first feature-flag request of a session ignoring a proxy or API endpoint set in a project's settings
• Fixed /ultrareview of a local branch silently leaving uncommitted work out of the upload in a repository that keeps its branches outside .git (git 2.54+); it now refuses with an explanation
• Fixed cloud sessions staying asleep after a container restart lost a pending /loop wakeup or scheduled task; Claude is now told and can schedule it again
• Fixed the Claude apps gateway's retention sweep deleting a returning developer's identity row refreshed at the same moment, on PostgreSQL versions without the November 2025 fixes
• Fixed sandboxed Monitor tool commands skipping the permission prompt under sandbox auto-allow; they now follow your permission rules
• Fixed the Claude apps gateway failing to start when the certificate it presents to the identity provider has an empty subject
• Fixed the Claude apps gateway exiting with a bare "Invalid URL" when store.postgres_url can't be parsed; the error now names the setting and says what the URL may hold
• Fixed background agents failing with "Agent stalled" and Workflow tool subagents restarting from their prompt when a Mac woke from sleep
• Fixed slow or failed startup since 2.1.285 under SDK hosts such as the VS Code extension when managed settings deny reads of many paths on a slow filesystem (notably Windows drives under WSL)
• Fixed a response interrupted by computer sleep being treated as a stalled stream on Bedrock, Vertex, Foundry, and custom gateways
• Fixed a freeze before the first request and in the /sandbox Config tab on Linux and WSL when a sandbox read rule such as ~/**/.env covers a large folder
• Fixed skills not being found when asked for by the name in SKILL.md when their folder has a different name (for example a non-English name): the skill listing now shows both names
• Fixed a plan written in plan mode being lost when a cloud session's container restarted before the plan was presented
• Fixed the Bash tool occasionally losing shell aliases, functions and plugin PATH entries for a whole session when its first command ran seconds after startup on a new config directory
• Fixed unbounded memory use when an HTTP MCP server sends a very large response
• Fixed artifact operations failing in a Claude Code run started from inside a cloud session (for example claude -p run from the Bash tool)
• Fixed files sent from remote sessions sometimes being refused as "not the one approved" when four or more were sent at once
• Fixed plan mode not being restored when resuming a session with --continue or --resume <session-id> in the terminal
• Fixed a marketplace named after another GitHub marketplace's download folder stopping that marketplace from downloading
• Fixed automatic compaction giving up with "Prompt is too long" when a Mac went to sleep while it was running
• Fixed the rewind menu (Esc Esc / /rewind) freezing for hundreds of milliseconds per keypress when the conversation contains a very large pasted stack trace or source file
• Fixed a subdirectory's AGENTS.md not being attached when a file under it is @-mentioned
• Fixed self-hosted runner sessions resumed after a stopped runner failing with "missing but already registered worktree" when the sessions folder is a relative symlink
• Fixed a freeze when the secret scan or a permission prompt met long token-like text
• Fixed Bash permission checks not applying Read deny rules or the outside-directory read block to a wildcard in some option values of read-only commands
• Fixed CLAUDE_CODE_USER_DIALOG_TIMEOUT_MS=5m being read as 5 ms and cancelling remote dialogs at once; values with a unit suffix now fall back to dialogExpiry
• Fixed a stall when an MCP server's tool listing contains very long runs of combining characters
• Fixed two pastes that overlap in one prompt being sent to the model partly as typed text instead of as one pasted block
• Fixed Claude in Chrome's browser picker showing a message meant for Claude when the chosen browser is no longer connected, and the VS Code dialog's list going stale after a switch
• Fixed background subagents losing write and Bash access in their worktree after the main session enters or exits a different worktree
• Fixed background commands, the agents view and daemon workers sending telemetry and a feature-flag request to Anthropic behind a Claude apps gateway when no managed settings on the machine force gateway login
• Fixed --restricted (and CLAUDE_CODE_RESTRICTED=1) sessions opening the cross-session messaging socket
• Fixed sessions moved to the background while idle reopening as "no saved transcript" after a restart or idle cleanup; they now resume their conversation
• Fixed background workers honoring --allow-dangerously-skip-permissions on respawn without the bypass-permissions disclaimer having been accepted
• Fixed Claude replying in an endless loop when a plugin's async Stop hook passes an unquoted script path under a folder with a space, such as Application Support
• Fixed a freeze of several seconds when secret masking met very long unbroken text
• Fixed some permission rules and safety checks not being applied to a tool call after a PreToolUse hook rewrote its input
• Fixed first launch asking to pick a login method again after claude auth login or with a credentials file already in the config directory
• Fixed file names containing line breaks being displayed incorrectly in file tool errors and permission prompts
• Fixed a large paste expanded in place being sent to the model as typed text after the next keystroke when it held accents stored as separate characters, as macOS file names do
• Fixed macOS /login reporting success when the keychain refused the new login and kept an old one it could not remove
• Fixed SDK hosts using --include-partial-messages seeing a reply stay open after the turn ended when its stream was cut, interrupted or fell back to non-streaming
• Fixed sandboxed Bash commands on Linux running ConfigChange hooks and reloading settings mid-command when .claude/settings.json or .claude/settings.local.json does not exist
• Fixed errors reading "Premature close" instead of naming the missing program when a tool Claude Code runs, such as git or gh, is not installed (macOS, Linux)
• Fixed /loop and other recurring session-only scheduled tasks running an extra time after a sandboxed Bash command on Linux or after .claude/scheduled_tasks.json was deleted
• Fixed edits to the file a symlinked settings file points at running without the settings-file permission question
• Improved MCP startup behind a network proxy: a server the proxy blocks (HTTP 403) is no longer retried three times
• Improved permission prompts from background agents to show the Ctrl+X Ctrl+K shortcut that stops all background agents
• Improved the built-in plugin-authoring skill: Claude now gives the one command another person runs to install a mod you made, and writes it in a README's install section
• Improved the reply to /plugin in the desktop app's Code tab: it now says where to install and manage plugins there
• Improved the Bash changed-files view: when a chained command includes git merge, pull or checkout, it lists the files without full diffs
• Improved the Claude apps gateway's log when an upstream's cloud credentials or connection fail: the warning now ends with the underlying cause
• Improved the error shown when a cloud session is started without a claude.ai sign-in: it now names claude auth login and /login and no longer blames API-key authentication
• Improved the Read tool's message for binary files: it now points Claude to a skill or a shell command that can read the format
• Improved the error shown when a git config file stops the /ultrareview upload: it is about half as long and says what kind of file is the problem
• Improved the errors shown when the /ultrareview upload refuses a checkout: each known cause now has its own message, with a way to fix it
• Improved the Claude apps gateway to log a warning during the last 30 days before the certificate it presents to the identity provider expires
• Improved Claude in Chrome: a browser_batch call now gets 90 seconds, up from 60, before it is reported as timed out
• Improved the Claude apps gateway's browser sign-in pages: brand fonts, centered layout, and dark mode
• Improved responsiveness while resuming large sessions: timers, input and rendering keep running while the transcript loads
• Improved the / and @ suggestion lists: the selected row now starts with a ❯ pointer, so you can see it without color
• Changed CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC to also skip the startup connection warm-up
• Changed Claude in Chrome so that a project's settings files can no longer turn it on; use --chrome, /chrome or your user settings
• Changed the Bash tool to ask for permission before running pyright, which is no longer treated as a read-only command
• Changed what a mod's $.process.spawn rejects with when another mod denies it after the child ran: it now says the call ran and a plugin withheld its result
• Changed the background daemon's log to write a multi-line message as one JSON-quoted line
• Changed skills and custom commands to refuse a ! shell command that contains raw control characters other than tab and newline, with a message that shows where they are
• Changed /artifacts: opening an artifact in your browser now closes the list
• Changed Bash permission checks so that more forms of the ps command ask for approval instead of running without asking
• Changed plugin hooks so long text is clipped and logged instead of being refused or dropped silently
• Changed background sessions whose scheduled task is gone: they now move to Completed about 20 seconds later and can be updated or shut down when idle
• Changed the "Press ← again" confirm on a just-cleared prompt: a second ← no longer has to wait a second before it switches, and holding ← down now switches too
• Changed the errors shown when the /ultrareview upload fails at a git step: they name the step and what to try, and no longer repeat git's own error text
• Changed /code-review at medium effort to also report cleanup and CLAUDE.md conventions findings on models without tuned review settings, including Opus 5.5 and Sonnet 5.5
• Changed an in-process teammate's agent_id in Agent results to its agent ID (its name@team address stays in teammate_id); TeammateIdle hooks no longer fire from its subagents or forks
• Changed background sessions waiting on a scheduled wakeup (/loop): they are now left running through updates and low memory, where being restarted or shut down could silently lose the wakeup
• Changed /model, /effort and /rename sent from claude agents to a busy background session to apply right away, without a confirmation, instead of when the turn ends
• Changed the Claude apps gateway's minimum supported PostgreSQL version from 14 to 11
• Changed the interactive session's WebSearch budget to refill over time (100 calls/hour; CLAUDE_CODE_WEB_SEARCH_REFILLS_PER_HOUR sets the rate, 0 turns it off) instead of ending after 200 calls
• Changed CLAUDE_CODE_DISABLE_ATTACHMENTS so a repository's .claude/settings.json or .claude/settings.local.json can no longer set it; shell, user and managed settings still can
• Changed claude plugin update on a plugin loaded from a directory to print just its reason, without the "Failed to update plugin" prefix, as for built-in plugins
• Changed the built-in gh api in cloud sessions: a host other than github.com set in GH_HOST or GH_REPO is now refused (use --hostname or a full URL), and stderr notes requests to other hosts
• Changed the claude-api skill's Managed Agents examples to turn off the web tools unless the agent needs them and to use the auto permission policy
• Self-hosted runners: Changed claude --environment <id> to create its session through the current Sessions API; printed and JSON session ids keep their session_… form
• [VSCode] Added a screen reader announcement, "Message queued.", when you send a message while Claude is working
• [VSCode] Added a way to review and run a plugin marketplace's install or update command from the Manage plugins dialog
• [VSCode] Fixed a blank chat you never typed into keeping a background Claude process running after you open a saved conversation in its place
• [VSCode] Fixed settings dialogs blaming a timeout when Claude Code stopped unexpectedly during a save
• [VSCode] Fixed the branch switch dialog offering to switch when it could not check for uncommitted changes
• [VSCode] Fixed a permission prompt that arrived behind an open dialog taking keyboard focus, so a key pressed in the dialog could answer it
• [VSCode] Fixed sign-in and new sessions giving no clear reason when Claude Code cannot find or start its program
• [VSCode] Fixed the agent map showing a nested sub-agent with "Tool calls (0)" and placing the agents it starts under the main agent
• [VSCode] Improved Continue After Reload: tabs reopened after VS Code restarts its extensions now also finish a step the restart interrupted
• [VSCode] Improved file pills in messages: hovering one now shows the file's path from the project folder, so same-named files can be told apart
• [VSCode] Changed message timestamps to show by default (turn them off with the Claude Code: Show Message Timestamps setting)
• [Cloud sessions] Fixed turning off prompt suggestions through a cloud environment's environment variables having no effect in new cloud sessions
• [Cloud sessions] Fixed the working indicator in a cloud session spinning on for several seconds after Claude's reply had finished; it now stops with the reply
• [Cloud sessions] Fixed History on a never-run routine's page still saying "No runs yet" after you pressed Run now; it now shows the new run
• [Cloud sessions] Fixed an unarchived cloud session looking as if Claude were still working until you sent another message
• [Remote Control] Fixed a computer that just started Remote Control taking up to a minute to appear in the Remote Control menu of a new session; it now appears within seconds
• [Claude Tag] Added fast mode in Slack: mention Claude with !fast to switch a thread to fast mode, moving it to Opus if needed, and !fast off to switch back; replies show (fast) while it's on
• [Claude Tag] Added the optional Path prefixes field when creating a custom connection in an access bundle, so its allow rule can cover only those paths instead of the whole host
• [Claude Tag] Fixed members with the Claude Tag Admin permission getting "Couldn't load memory files" on the Activity page's Memory tab; they can now read workspace and channel memory
• [Claude Tag] Fixed a workspace guest's Confirm on a Claude settings card in Slack removing its buttons for everyone; only the guest sees the refusal, and members can still confirm or cancel
• [Claude Tag] Fixed scheduled routines in Slack channels running on a model other than the channel's default; each run that starts a new session now uses the current default model
• [Claude Tag] Fixed GitHub repositories in an access bundle attached by a channel-name rule being refused in the channels the rule covers; Claude can now add, list and clone them there
• [Claude Tag] Improved Claude's notice in your direct messages when your own Claude plan's usage limit is reached: it shows within seconds and says when the limit resets
• [Claude Tag] Improved the earlier Claude in Slack app's reply when it can't start a session: it now says what failed and who can fix it, in full only once per thread
• [Claude Tag] Changed the channel instructions limit to 8,192 characters instead of bytes, so non-English text gets the same room, and added a character count beside Save on the Configure page
• [Code Review] Fixed blocking review comments sometimes opening with a "nit" label that contradicted their severity
• [Code Review] Fixed tips to comment "@claude review" being posted on fork and Manual-mode pull requests in organizations that have turned Code Review off

Source

Originally published at github.com.

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